com.scalar.db.sql.metadata

Interface Metadata

All Known Implementing Classes:

CachedMetadata

public interface Metadata

The metadata of ScalarDB.

Method Summary

Modifier and Type	Method and Description
java.util.Optional<NamespaceMetadata>	getNamespace(java.lang.String namespaceName) Returns a NamespaceMetadata object for the specified namespace
java.util.Map<java.lang.String,NamespaceMetadata>	getNamespaces() Returns a map of the namespace names and NamespaceMetadata objects.
java.util.Optional<UserMetadata>	getUser(java.lang.String username) Returns a UserMetadata object for the specified user.
java.util.Map<java.lang.String,UserMetadata>	getUsers() Returns a map of the usernames and UserMetadata objects.

Method Detail

getNamespaces

java.util.Map<java.lang.String,NamespaceMetadata> getNamespaces()

Returns a map of the namespace names and NamespaceMetadata objects.

Returns:

a map of the namespace names and NamespaceMetadata objects

Throws:

SqlException - if an unexpected error happens

getNamespace

java.util.Optional<NamespaceMetadata> getNamespace(java.lang.String namespaceName)

Returns a NamespaceMetadata object for the specified namespace

Parameters:

namespaceName - the name of the target namespace

Returns:

a NamespaceMetadata object

Throws:

SqlException - if an unexpected error happens

getUsers

java.util.Map<java.lang.String,UserMetadata> getUsers()

Returns a map of the usernames and UserMetadata objects.

Returns:

a map of the usernames and UserMetadata objects

Throws:

SqlException - if an unexpected error happens

getUser

java.util.Optional<UserMetadata> getUser(java.lang.String username)

Returns a UserMetadata object for the specified user.

Parameters:

username - the name of the target user

Returns:

a UserMetadata object

Throws:

SqlException - if an unexpected error happens